I'm thinking about the players when they leave PSG and how this item affected their performance, first superstar player who left this team was Messi and he joined Inter Miami while Inter Miami is a weak team in America and they are on 15th place in the table other players like Neymar they can't find a good team too because there are not many teams they want to hire a player like Neymar. PSG had definitely a bad effect on their football life because they join this team only for earning more money and nothing else.
I think in this case it is not a limit that can really be said as a benchmark.
Messi to Inter Miami he is aware of his age, even though in this case he could still be at a club that is still in a European environment or another prestigious domestic league but money of course matters and I still feel that there are no big clubs with that level of competence tall who is really ready to pay crazy fees for players of today's age even if he is a goat.
Neymar's problem is the same, it doesn't mean that he doesn't have big clubs who see it, it's just that the salary is already too high, sometimes this becomes difficult for himself, especially since he also said he didn't really want to cut his salary.
The benchmark is still based on that because indeed if the big players don't think too much about the salary they get at a new club then it's clear they will do that and fight for signatures.